Hi was wanting to ask a question. We haven't used the pool this summer because of problems clearing it out. We just bought a D.E filter. Well after putting it in we noticed the jets have a very light flow. We just noticed that the main drain cover was taken off. Not knowing if this happened last year since it has not been in use. Well I'm wondering since this is off will this cause flow problems? We had someone come to see what was causing the poor flow through the Jets and he suggested we buy a new pump. He said it doesn't matter if there are rocks stuck in the main drain that even if he cleared that up we will still have a problem. I don't know if he is being truthful or if this is really a problem. It works fine when we have it in recirculate and backwash. We just have a weak flow once we put it on filter. I know there are rocks stuck in there because my dad went down trying to clear it out for us but he just couldn't stay down long. So I don't know if we should try and clear it out. Or listen to the pool company and just buy a new pump. Thank you in advance for reading my concern.